EP 0033882 B1 19850904 - PROCESS FOR THE MANUFACTURE OF AN OPTICALLY ACTIVE SURFACE ELEMENT
Title (en)
PROCESS FOR THE MANUFACTURE OF AN OPTICALLY ACTIVE SURFACE ELEMENT
Publication
Application
Priority
CH 58880 A 19800125
Abstract (en)
[origin: EP0033882A2] 1. A process for the production of an optically active surface structure, in which a dot or line grid is optically represented on a transparent carrier having a photo-sensitive layer, those parts of which on which light is incident exhibiting a different solubility or etchability from those parts on which light is not incident, characterized in that a grid is represented in which one or more grid elements are provided per square millimeter ; and that the dissolution or etching is continued until raised cylindrical or spherical elements become visible in the photo-sensitive layer, or i nthe carrier.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G03C 1/76 (2013.01); G03F 7/0007 (2013.01); G03F 7/001 (2013.01)
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0033882 A2 19810819; EP 0033882 A3 19820630; EP 0033882 B1 19850904; AT E15413 T1 19850915; DE 3172095 D1 19851010
DOCDB simple family (application)
EP 81100533 A 19810125; AT 81100533 T 19810125; DE 3172095 T 19810125